Cog looks like a normal 12-year-old boy. But his name is short for “cognitive development”, and he was built to learn. After an accident leaves him damaged, Cog wakes up in an unknown lab - and Gina, the scientist who created and cared for him, is nowhere to be found. Surrounded by scientists who want to study him and remove his brain, Cog recruits four robot accomplices for a mission to find her. Cog, ADA, Proto, Trashbot, and Car’s journey will likely involve much cognitive development in the form of mistakes, but Cog is willing to risk everything to find his way back to Gina.

Bell has spent his whole life—all eleven years of it—on Mars. But he's still just a regular kid—he loves cats and any kind of cake, and is curious about the secrets the adults in the US colony are keeping. Like, why don't they have contact with anyone on the other Mars colonies? Why are they so isolated? When a virus breaks out and the grown-ups all fall ill, Bell and the other children are the only ones who can help. It's up to Bell—a regular kid in a very different world—to uncover the truth and save his family...and possibly unite an entire planet.

Everyone who wishes upon a star, or a candle, or a penny thrown into a fountain knows that you're not allowed to tell anyone what you've wished for. But even so, there is someone out there who hears it. In a magical land called the Haven lives a young fairy named Ophelia Delphinium Fidgets. Ophelia is no ordinary fairy - she is a Granter: one of the select fairies whose job it is to venture out into the world and grant the wishes of unsuspecting humans every day.

"Are you a gifted child looking for special opportunities?" Dozens of children respond to this peculiar ad in the newspaper and are then put through a series of mind-bending tests, which readers take along with them. Only four children—two boys and two girls—succeed. Their challenge: to go on a secret mission that only the most intelligent and inventive children could complete. To accomplish it they will have to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules.

Fiercetooth, a NightWing obsessed with what could have - and should have - been. Deathbringer, desperate to prove himself as the next great NightWing assassin. Six-Claws, a loyal SandWing, who will soon find that loyalty comes with a price. Foeslayer the NightWing, a dragon in love turned kidnapper, and Prince Arctic of the IceWings, a runaway turned captive. In these four short stories, dig deeper into the world of Pyrrhia to discover what really happened.

Island of the Blue Dolphins is the remarkable story of a strange and beautiful Indian girl who lives a serene and courageous life as the solitary survivor on an island off the California coast. Left behind when the rest of her tribe fled, she waits, year after year, for a ship to come for her. She fights for her very survival, building a shelter, hunting for food, and making weapons to stave off her enemies, the wild dogs who took her brother.

Like his fellow lunarnauts - otherwise known as Moonies - living on Moon Base Alpha, twelve-year-old Dashiell Gibson is famous the world over for being one of the first humans to live on the moon. And he's bored out of his mind. Kids aren't allowed on the lunar surface, meaning they're trapped inside the tiny moon base with next to nothing to occupy their time - and the only other kid Dash's age spends all his time hooked into virtual reality games.

Every year the people of the Protectorate leave a baby as an offering to the witch who lives in the forest. They hope this sacrifice will keep her from terrorizing their town. But the witch in the forest, Xan, is kind and gentle. She shares her home with a wise Swamp Monster named Glerk and a Perfectly Tiny Dragon, Fyrian. Xan rescues the abandoned children and delivers them to welcoming families on the other side of the forest, nourishing the babies with starlight on the journey.

On his 13th birthday, foster child Alcatraz Smedry gets a bag of sand in the mail - his only inheritance from his father and mother. He soon learns that this is no ordinary bag of sand. It is quickly stolen by the cult of evil Librarians who are taking over the world by spreading misinformation and suppressing truth. Alcatraz must stop them, using the only weapon he has: an incredible talent for breaking things.

For Milo, everything’s a bore. When a tollbooth mysteriously appears in his room, he drives through only because he’s got nothing better to do. But on the other side, things seem different. Milo visits the Island of Conclusions (you get there by jumping), learns about time from a ticking watchdog named Tock, and even embarks on a quest to rescue Rhyme and Reason. Somewhere along the way, Milo realizes something astonishing. Life is far from dull. In fact, it’s exciting beyond his wildest dreams.

Jess Aarons has been practicing all summer so he can be the fastest runner in the fifth grade. And he almost is, until the new girl in school, Leslie Burke, outpaces him. The two become fast friends and spend most days in the woods behind Leslie's house, where they invent an enchanted land called Terabithia. One morning, Leslie goes to Terabithia without Jess and a tragedy occurs.

When suburban Claudia Kincaid decides to run away, she knows she doesn't just want to run from somewhere she wants to run to somewhere--to a place that is comfortable, beautiful, and preferably elegant. She chooses the Metropolitan Museum of Art in New York City. Knowing that her younger brother, Jamie, has money and thus can help her with the serious cash flow problem she invites him along.

There are two rules when it comes to the dragons: don’t let them out of the bag and don’t feed them anything sweet! When Jaxon is sent to spend the day with a mean old lady his mother calls Ma, he finds out she’s not his grandmother—but she is a witch! She needs his help delivering baby dragons to a magical world where they’ll be safe. Hear about Jax’s first three adventures in this collection!

Sara Martinez is a hacker. She recently broke into the New York City foster care system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, Sara finds herself facing years in a juvenile detention facility and banned from using computers for the same stretch of time. Enter Mother, a British spy who not only gets Sara released from jail but also offers her a chance to make a home for herself within a secret MI5 agency. Operating out of a base in Scotland, the City Spies are five kids from various parts of the world.

Before they were the Boxcar Children, Henry, Jessie, Violet, and Benny Alden lived with their parents on Fair Meadow Farm. Although times are hard, the Aldens are happy - “the best family of all,” Mama likes to say. One day, a blizzard hits the countryside, and a traveling family needs shelter. The Aldens take them in, and the strangers soon become friends. But things never stay the same at the farm, and the spring and summer bring events that will forever change their lives.